Reduce failsafe time for animation events. This makes the lock-time more consistent.

ui/login/account_picker/user_pod_row.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview User pod row implementation.
  */
 
 cr.define('login', function() {
   /**
@@ skipping 3229 matching lines @@
     },
 
     /**
      * Called right after the pod row is shown.
      */
     handleAfterShow: function() {
       // Without timeout changes in pods positions will be animated even though
       // it happened when 'flying-pods' class was disabled.
       setTimeout(function() {
         Oobe.getInstance().toggleClass('flying-pods', true);
+        ensureTransitionEndEvent(focusedPod);

[xiyuan, 2016/03/18 15:37:48]

We need to test |focusedPod| because |focusedPod| is set around line 3254 inside
"if (this.focusedPod_) {" below. If |this.focusedPod_| is not set, we would end
up with a JS error.

Also, for better readability, we should move decl "var focusedPod;" to the
beginning of the function to avoid confusions.

[jdufault, 2016/03/18 17:31:56]

Done.

       }, 0);
       // Force input focus for user pod on show and once transition ends.
       if (this.focusedPod_) {
         var focusedPod = this.focusedPod_;
         var screen = this.parentNode;
         var self = this;
         focusedPod.addEventListener('webkitTransitionEnd', function f(e) {
           focusedPod.removeEventListener('webkitTransitionEnd', f);
           focusedPod.reset(true);
           // Notify screen that it is ready.
           screen.onShow();
         });
-        // Guard timer for 1 second -- it would conver all possible animations.
-        ensureTransitionEndEvent(focusedPod, 1000);
       }
     },
 
     /**
      * Called right before the pod row is shown.
      */
     handleBeforeShow: function() {
       Oobe.getInstance().toggleClass('flying-pods', false);
       for (var event in this.listeners_) {
         this.ownerDocument.addEventListener(
@@ skipping 46 matching lines @@
        if (pod && pod.multiProfilesPolicyApplied) {
          pod.userTypeBubbleElement.classList.remove('bubble-shown');
        }
      }
   };
 
   return {
     PodRow: PodRow
   };
 });